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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<span class="sourceLineNo">003</span> * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<span class="sourceLineNo">007</span> * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<span class="sourceLineNo">014</span> * See the License for the specific language governing permissions and<a name="line.14"></a>
<span class="sourceLineNo">015</span> * limitations under the License.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>package org.apache.commons.io.filefilter;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.io.File;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.io.Serializable;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.nio.file.FileVisitResult;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.nio.file.Files;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.nio.file.Path;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.nio.file.attribute.BasicFileAttributes;<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>/**<a name="line.26"></a>
<span class="sourceLineNo">027</span> * This filter accepts {@code File}s that can be written to.<a name="line.27"></a>
<span class="sourceLineNo">028</span> * &lt;p&gt;<a name="line.28"></a>
<span class="sourceLineNo">029</span> * Example, showing how to print out a list of the current directory's &lt;i&gt;writable&lt;/i&gt; files:<a name="line.29"></a>
<span class="sourceLineNo">030</span> * &lt;/p&gt;<a name="line.30"></a>
<span class="sourceLineNo">031</span> * &lt;h2&gt;Using Classic IO&lt;/h2&gt;<a name="line.31"></a>
<span class="sourceLineNo">032</span> * &lt;pre&gt;<a name="line.32"></a>
<span class="sourceLineNo">033</span> * File dir = new File(".");<a name="line.33"></a>
<span class="sourceLineNo">034</span> * String[] files = dir.list(CanWriteFileFilter.CAN_WRITE);<a name="line.34"></a>
<span class="sourceLineNo">035</span> * for (String file : files) {<a name="line.35"></a>
<span class="sourceLineNo">036</span> *     System.out.println(file);<a name="line.36"></a>
<span class="sourceLineNo">037</span> * }<a name="line.37"></a>
<span class="sourceLineNo">038</span> * &lt;/pre&gt;<a name="line.38"></a>
<span class="sourceLineNo">039</span> *<a name="line.39"></a>
<span class="sourceLineNo">040</span> * &lt;p&gt;<a name="line.40"></a>
<span class="sourceLineNo">041</span> * Example, showing how to print out a list of the current directory's &lt;i&gt;un-writable&lt;/i&gt; files:<a name="line.41"></a>
<span class="sourceLineNo">042</span> *<a name="line.42"></a>
<span class="sourceLineNo">043</span> * &lt;pre&gt;<a name="line.43"></a>
<span class="sourceLineNo">044</span> * File dir = new File(".");<a name="line.44"></a>
<span class="sourceLineNo">045</span> * String[] files = dir.list(CanWriteFileFilter.CANNOT_WRITE);<a name="line.45"></a>
<span class="sourceLineNo">046</span> * for (String file : files) {<a name="line.46"></a>
<span class="sourceLineNo">047</span> *     System.out.println(file);<a name="line.47"></a>
<span class="sourceLineNo">048</span> * }<a name="line.48"></a>
<span class="sourceLineNo">049</span> * &lt;/pre&gt;<a name="line.49"></a>
<span class="sourceLineNo">050</span> *<a name="line.50"></a>
<span class="sourceLineNo">051</span> * &lt;p&gt;<a name="line.51"></a>
<span class="sourceLineNo">052</span> * &lt;b&gt;N.B.&lt;/b&gt; For read-only files, use {@code CanReadFileFilter.READ_ONLY}.<a name="line.52"></a>
<span class="sourceLineNo">053</span> *<a name="line.53"></a>
<span class="sourceLineNo">054</span> * @since 1.3<a name="line.54"></a>
<span class="sourceLineNo">055</span> */<a name="line.55"></a>
<span class="sourceLineNo">056</span>public class CanWriteFileFilter extends AbstractFileFilter implements Serializable {<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span>    /** Singleton instance of &lt;i&gt;writable&lt;/i&gt; filter */<a name="line.58"></a>
<span class="sourceLineNo">059</span>    public static final IOFileFilter CAN_WRITE = new CanWriteFileFilter();<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span>    /** Singleton instance of not &lt;i&gt;writable&lt;/i&gt; filter */<a name="line.61"></a>
<span class="sourceLineNo">062</span>    public static final IOFileFilter CANNOT_WRITE = CAN_WRITE.negate();<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span>    private static final long serialVersionUID = 5132005214688990379L;<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span>    /**<a name="line.66"></a>
<span class="sourceLineNo">067</span>     * Restrictive constructor.<a name="line.67"></a>
<span class="sourceLineNo">068</span>     */<a name="line.68"></a>
<span class="sourceLineNo">069</span>    protected CanWriteFileFilter() {<a name="line.69"></a>
<span class="sourceLineNo">070</span>    }<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span>    /**<a name="line.72"></a>
<span class="sourceLineNo">073</span>     * Checks to see if the file can be written to.<a name="line.73"></a>
<span class="sourceLineNo">074</span>     *<a name="line.74"></a>
<span class="sourceLineNo">075</span>     * @param file the File to check<a name="line.75"></a>
<span class="sourceLineNo">076</span>     * @return {@code true} if the file can be written to, otherwise {@code false}.<a name="line.76"></a>
<span class="sourceLineNo">077</span>     */<a name="line.77"></a>
<span class="sourceLineNo">078</span>    @Override<a name="line.78"></a>
<span class="sourceLineNo">079</span>    public boolean accept(final File file) {<a name="line.79"></a>
<span class="sourceLineNo">080</span>        return file.canWrite();<a name="line.80"></a>
<span class="sourceLineNo">081</span>    }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span>    /**<a name="line.83"></a>
<span class="sourceLineNo">084</span>     * Checks to see if the file can be written to.<a name="line.84"></a>
<span class="sourceLineNo">085</span>     * @param file the File to check<a name="line.85"></a>
<span class="sourceLineNo">086</span>     *<a name="line.86"></a>
<span class="sourceLineNo">087</span>     * @return {@code true} if the file can be written to, otherwise {@code false}.<a name="line.87"></a>
<span class="sourceLineNo">088</span>     * @since 2.9.0<a name="line.88"></a>
<span class="sourceLineNo">089</span>     */<a name="line.89"></a>
<span class="sourceLineNo">090</span>    @Override<a name="line.90"></a>
<span class="sourceLineNo">091</span>    public FileVisitResult accept(final Path file, final BasicFileAttributes attributes) {<a name="line.91"></a>
<span class="sourceLineNo">092</span>        return toFileVisitResult(Files.isWritable(file), file);<a name="line.92"></a>
<span class="sourceLineNo">093</span>    }<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span>}<a name="line.95"></a>




























































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